strange thing in bibliography

last year i entered the CyPosium book into the bibliography, which was edited by myself & annie abrahams. just now i was looking at the bibliography, & i saw that on /en/biblio there are 2 entries for the CyPosium book & that it says [Anonymous] where all the other listings have the author or editors displaying.

i clicked on the 2 entries; one goes to the biblio entry (/en/content/cyposium-book-1), where we are listed as the editors; and one goes to the event post about the launch of the book (/en/content/cyposium-book-0).

so:
- why is the event post showing up in on /en/biblio ?
- why are the editors' names not showing up? as far as i can see all other entries have author or editor names showing.